TODO
Platform and version requirements: JVM (1.0), JS (1.0), Native (1.0) 
fun TODO(): Nothing
Always throws NotImplementedError stating that operation is not implemented.
Platform and version requirements: JVM (1.0), JS (1.0), Native (1.0) 
fun TODO(reason: String): Nothing
Always throws NotImplementedError stating that operation is not implemented.
Parameters
 reason - a string explaining why the implementation is missing.
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Licensed under the Apache License, Version 2.0.
    https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-t-o-d-o.html